Section 13 Rent Increase UK 2026: What Landlords Must Know
Published · Updated · 4 min read
Raising rent in 2026 is not as simple as adding a clause to your contract. Instead, the UK rent increase Section 13 2026 process replaces most contractual increases. As a result, get the timing wrong and you wait another year. Similarly, get the notice wrong and you start again.
Rent growth has cooled, but voids are still expensive. Therefore, price to market, follow Form 4A, and keep a clean audit trail.
Key facts at a glance
- Method: Section 13 with Form 4A notice
- Frequency: Once every 12 months (general rule)
- Benchmark: Open-market rent for comparable properties
- Market: National growth ~1.9% to 2.2%, supply still tight
Quick watch: latest UK rental market insights
UK rent market in 2026: slower growth, tight supply
Nationally, UK rent growth has eased to roughly 1.9% to 2.2%. However, supply remains tight in many postcodes, so demand can still support sensible increases where the evidence supports them.
In practice, that means landlords should benchmark carefully rather than chase last year's headline figures. For example, a flat national average can hide strong local demand in commuter towns or university areas. Conversely, oversupplied streets may need a hold strategy until comparables improve.
Section 13 and uk rolling tenancy agreements
With periodic tenancies now the default, most UK landlords hold uk rolling tenancy agreements rather than fixed terms. Because of this shift, rent increases on rolling contracts must follow Section 13. In other words, you cannot rely on an old AST clause that says rent rises every six months.
Our guide on uk rolling tenancy agreements explains how periodic contracts interact with the new rent rules. Meanwhile, if you are still on a legacy agreement, review the wording before you serve any notice.
Why rolling contracts change how you raise rent
Under the Renters' Rights Act framework, the statutory route matters more than contract wording alone. Therefore, even where a tenancy agreement mentions rent reviews, Section 13 and Form 4A are now the practical path for most landlords.
Additionally, the 12-month frequency rule applies per tenancy. As a result, serving notice too early can invalidate the increase and force you to wait before trying again.
The Form 4A process step by step
First, complete Form 4A with the proposed new rent and effective date. Next, serve the notice correctly and retain proof of delivery. After that, the tenant can accept, ignore (deemed acceptance in some cases), or refer the matter to the First-tier Tribunal.
For the full workflow, see our detailed walkthrough on how to navigate the new Section 13 rent increase rules. In addition, keep copies of comparables so you can defend the proposed figure if challenged.
Pricing in a cooling market
National averages mask local reality. For instance, some postcodes still see strong demand while others are flat. Before serving notice, therefore, check open-market comparables and your void risk.
Ultimately, an empty property usually costs more than a modest increase foregone. So price strategically: aim for sustainable occupancy, not a headline rent that sits void for weeks.
What happens if a tenant challenges the increase
If the tenant refers the case to tribunal, the proposed rent is assessed against open-market evidence. Consequently, weak comparables or inconsistent paperwork can delay or reduce the outcome you wanted.
That is why a clear audit trail matters from day one. In short, document how you chose the figure, when you served notice, and how the tenant responded.
Watch: 2026 property market and rent outlook
Track rent and serve notices correctly
Use Lendlord to keep a defensible audit trail
Lendlord Tenancies Management logs rent payments, generates invoices, and stores tenant communications. When you serve Form 4A, therefore, keep a copy in the Document Hub with a delivery timestamp. In addition, pair it with Cash Flow Tracking to see how the increase affects your portfolio P&L instantly.
Meanwhile, need a compliant periodic contract before you discuss rent? Start with a tenancy agreement template uk that includes the correct 2026 rent clauses, then manage increases through Section 13 only.
Five steps to serve Form 4A correctly
Follow this sequence each time you propose a new rent. In practice, most delays come from skipped checks rather than tribunal disputes.
- Benchmark the open-market rent using local comparables.
- Check the 12-month rule since your last increase or tenancy start.
- Complete Form 4A with accurate dates and amounts.
- Serve correctly and retain proof of delivery.
- Update your rent ledger in Lendlord on the effective date.
Short: UK market context for rent decisions
Track rent, serve Form 4A correctly, and monitor portfolio cash flow in one tenancy management platform.
Manage rent and tenanciesFrequently asked questions
Can I still increase rent in a tenancy agreement in 2026?
In most cases, contractual rent increase clauses are largely replaced by the Section 13 process under the Renters' Rights Act. Therefore, you must use Form 4A and follow annual limits.
What is Form 4A?
Form 4A is the official notice landlords use to propose a rent increase under Section 13. Specifically, it must include the new rent, start date, and information about the tenant's ability to challenge.
How often can I raise rent under Section 13?
Generally, you can raise rent once every 12 months per tenancy. However, the figure must align with the open-market rent benchmark and may be reviewed by tribunal if challenged.
Are UK rents still rising in 2026?
Yes, but growth has cooled to roughly 1.9% to 2.2% nationally. Even so, supply remains tight in many postcodes. As a result, price strategically rather than aggressively.